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igb: Support sending custom Ethernet FCS.
Including bad FCS, used generate frames with bad FCS to test other system's handling of RX of bad packets. Signed-off-by: Ben Greear <greearb@candelatech.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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@ -1964,6 +1964,8 @@ static int __devinit igb_probe(struct pci_dev *pdev,
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NETIF_F_IPV6_CSUM |
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NETIF_F_SG;
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netdev->priv_flags |= IFF_SUPP_NOFCS;
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if (pci_using_dac) {
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netdev->features |= NETIF_F_HIGHDMA;
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netdev->vlan_features |= NETIF_F_HIGHDMA;
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@ -4293,6 +4295,8 @@ static void igb_tx_map(struct igb_ring *tx_ring,
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/* write last descriptor with RS and EOP bits */
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cmd_type |= cpu_to_le32(size) | cpu_to_le32(IGB_TXD_DCMD);
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if (unlikely(skb->no_fcs))
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cmd_type &= ~(cpu_to_le32(E1000_ADVTXD_DCMD_IFCS));
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tx_desc->read.cmd_type_len = cmd_type;
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/* set the timestamp */
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